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m40 318i ecu run a m40 316i?

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    m40 318i ecu run a m40 316i?

    just a quick one here.

    ive a 89 touring and ive just put in a 316i m40 engine,i know your all saying why i did that,simple couldnt find a 318i m40 engine anywhere realy.

    right back to the question,ive put in 1.6 engine,but was forced to use the tourings 1.8 ecu and inlet manifold/injectors,and still using the 1.6 afm.

    a right mix of bits,it does run but not great.

    i think its over fueling

    sure let me hear your thoughts


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    Last edited by koqiciwe; 04-02-2020, 07:57 PM.

    #2
    The two DMEs have different part numbers.

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      #3
      Originally posted by koqiciwe View Post
      just a quick one here.

      ive a 89 touring and ive just put in a 316i m40 engine,i know your all saying why i did that,simple couldnt find a 318i m40 engine anywhere realy.

      right back to the question,ive put in 1.6 engine,but was forced to use the tourings 1.8 ecu and inlet manifold/injectors,and still using the 1.6 afm.

      a right mix of bits,it does run but not great.

      i think its over fueling

      sure let me hear your thoughts
      Unless you are a seasoned tuner who has a thorough understanding of engine design, it is not a good idea to Frankenstein a motor the way you did because you will end up with screwed up idling, power delivery, and fuel economy characteristics. The manifold, exhaust, injectors and ECU for engine X generally are not designed to work with the power and fuel economy characteristics of engine Y, even if they fit.

      That said, if you can find a way to increase the stroke of the engine in your car by 7mm, it should run correctly as I believe the 1.8L M40 is just a stroked up 1.6L version.

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